The Chinese also launched weather balloons near their theodolites to measure atmospheric temperature and pressure changes to better estimate refraction errors.
中国还在经纬仪附近发射了气象气球来测量大气温度和压力变化，以更好地估计折射误差。
A few weeks later, Larry bought 42 one-meter diameter weather balloons.
几个星期后，拉里买了42个直径为1米的气象探测气球。
As he watched jets fly overhead, an idea came to him to use weather balloons to fly.
他看到喷气机从头顶飞过，就想到可以用气象探测气球来飞行。
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